A spray tower for treating tail gas of a tetrafluoromethane production line

Abstract

The utility model relates to the technical field of chemical production, and more particularly to a spray tower for treating tail gas of tetrafluoromethane production line, which adopts a combination structure of multiple spray modules and guide plate groups. The guide plate groups divide the airflow into multiple interconnected cavities, significantly prolonging the contact time and contact area of the waste gas and the spray solution. The high-dispersion droplets produced by the atomizing nozzles further improve the neutralization reaction efficiency. This structure effectively overcomes the problem of insufficient purification caused by the too-fast escape of waste gas in traditional treatment, thereby significantly improving the removal rate of acidic gases and harmful by-products and reducing the risk of secondary pollution.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and more specifically, to a spray tower for treating tail gas in a tetrafluoromethane production line. Background Technology

[0002] Tetrafluoromethrin is a pyrethroid compound with the chemical formula C38H44F8O6, belonging to the fourth generation of pyrethroid insecticides. It repels and kills mosquitoes through trace amounts of anesthetic or toxic agents. Due to its high efficacy, low toxicity to mammals, and good environmental compatibility, tetrafluoromethrin has been widely used in household hygiene insecticides and public health mosquito control.

[0003] Industrial production of tetrafluoromethyl ether generates industrial waste gas, which includes small amounts of solvent volatilization, acidic hydrogen chloride gas, or other reaction byproducts generated under specific reaction conditions. Because these industrial waste gases are toxic, they need to be treated before being discharged. The current treatment method is to directly treat the waste gas in an alkaline solution tank. However, due to the rapid dissipation of industrial waste gas, this method is difficult to fully remove harmful substances and can easily cause secondary pollution. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a spray tower for treating the tail gas of a tetrafluoromethyl ether production line, designed to fully neutralize and treat industrial waste gas, improve the quality of tail gas emissions, and reduce environmental pollution.

[0005] A spray tower for treating tail gas from a tetrafluoromethyl ether production line according to an embodiment of the present invention includes: An air intake chamber, on which an air intake pipe is provided; An exhaust chamber, on which an exhaust pipe is provided; A spray module is provided, at least one of which is arranged between the air intake chamber and the exhaust chamber. Each spray module has an outer shell, within which a spray pipe assembly is provided. The spray pipe assembly is equipped with atomizing nozzles and a high-pressure pump. A guide plate assembly is provided within the outer shell, which divides the outer shell assembly into multiple interconnected cavities. A water tank is located below the spray module and is used to supply spray solution to the spray pipe assembly.

[0006] According to some embodiments of the present invention, the guide plate assembly includes a first guide plate and a second guide plate, the upper end of the first guide plate is fixedly connected to the upper end of the outer shell, and the lower end of the second guide plate is fixedly connected to the lower end of the outer shell.

[0007] According to some embodiments of the present invention, the first guide plate and the second guide plate are respectively provided with guide grooves in the vertical direction.

[0008] According to some embodiments of the present invention, the spray pipe assembly includes a main pipe, which has several branch pipes arranged horizontally, and a control valve is provided on the main pipe; one end of the main pipe is connected to the output end of the high-pressure pump.

[0009] According to some embodiments of this utility model, a wire mesh demister is provided inside the exhaust chamber.

[0010] According to some embodiments of the present invention, a viewing window is provided on one side of the outer casing, and an inspection port is provided on the top of the outer casing.

[0011] According to some embodiments of the present invention, the water tank includes a water collection tank and a water supply tank, and a liquid collection hopper is provided at the lower end of the outer shell, the liquid collection hopper being connected to the water collection tank; the input end of the high-pressure pump is located in the water supply tank.

[0012] According to some embodiments of the present invention, a filter plate is provided between the water collection tank and the water supply tank.

[0013] According to some embodiments of this utility model, an inlet pipe and a drain pipe are provided on one side of the water supply tank, an inlet valve is provided on the inlet pipe, and a drain valve is provided on the drain pipe.

[0014] According to some embodiments of the present invention, the air intake chamber is provided with an air intake hopper, and the air intake pipe is provided on the air intake hopper; the exhaust chamber is provided with an exhaust hopper, and the exhaust pipe is provided on the exhaust hopper.

[0015] A spray tower for treating tail gas from a tetrafluoromethyl ether production line according to an embodiment of the present invention has at least the following beneficial effects: According to the present invention, the tail gas treatment spray tower of the tetrafluoromethane (TEM) production line adopts a multi-stage spray module and guide plate assembly combination structure. The guide plate assembly divides the airflow into multiple interconnected chambers, significantly extending the contact time and contact area between the waste gas and the spray solution. The highly dispersed droplets generated by the atomizing nozzles further improve the neutralization reaction efficiency. This structure effectively overcomes the problem of insufficient purification caused by excessively rapid waste gas dispersion in traditional treatments, thereby significantly improving the removal rate of acidic gases and harmful byproducts and reducing the risk of secondary pollution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a structural schematic diagram from one perspective of the present invention and a cross-sectional structural schematic diagram of AA. Figure 3 This is a schematic diagram of the structure of the spray module of this utility model; Figure 4 This is a schematic diagram of the structure of the first guide plate of this utility model; Figure 5 This is a schematic diagram of the structure of the water tank of this utility model.

[0017] In the picture: 100 - Air intake chamber, 110 - Air intake pipe, 120 - Air intake bucket; 200 - Exhaust chamber, 210 - Exhaust pipe, 220 - Wire mesh demister, 230 - Exhaust hopper; 300-Spray module, 310-Outer casing, 311-Viewing window, 312-Inspection port, 313-Collection hopper, 320-Spray pipe assembly, 321-Atomizing nozzle, 322-High-pressure pump, 323-Main pipe, 324-Branch pipe, 325-Control valve, 330-Guide plate assembly, 331-First guide plate, 3311-Guide groove, 332-Second guide plate; 400-Water tank, 410-Water collection trough, 420-Water supply trough, 421-Inlet pipe, 422-Drain pipe, 423-Inlet valve, 424-Drain valve, 430-Filter plate. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 5 As shown, this utility model discloses a spray tower for treating the tail gas of a tetrafluoromethyl ether production line. The spray tower includes an inlet chamber 100, an exhaust chamber 200, a spray module 300, and a water tank 400. The inlet chamber 100 is equipped with an inlet pipe 110; the exhaust chamber 200 is equipped with an exhaust pipe 210; at least one spray module 300 is provided, and all spray modules 300 are arranged between the inlet chamber 100 and the exhaust chamber 200; each spray module 300 is equipped with an outer shell 310, and a spray pipe assembly 320 is provided inside the outer shell 310. The spray module 300 is equipped with an atomizing nozzle 321, and the spray pipe assembly 320 is equipped with a high-pressure pump 322. A guide plate assembly 330 is installed inside the outer casing 310, which divides the outer casing 310 into multiple interconnected cavities. A water tank 400 is located below the spray module 300 and is used to supply spray solution to the spray pipe assembly 320. In this embodiment, since the industrial waste gas is weakly acidic, the spray solution can be a circulating alkaline solution for neutralization. After a certain period of circulation, alkaline solution is added or the spray solution is replaced according to the pH value. Specifically, in this embodiment, the industrial waste gas enters the inlet chamber 100 through the inlet pipe 110 and then flows upward through each stage of the spray module 300. Inside the spray module 300, the high-pressure pump 322 delivers the alkaline spray solution from the water tank 400 to the spray pipe assembly 320, and converts it into fine droplets through the atomizing nozzle 321. The exhaust gas and droplets come into full contact within the multi-stage chamber formed by the guide plate assembly 330, where harmful substances are neutralized and absorbed by the alkaline solution. The purified gas continues to rise to the exhaust chamber 200 and is finally discharged through the exhaust pipe 210, while the absorbed liquid flows back to the lower water tank 400. In this embodiment, the number of spray modules 300 can be set according to the proportion of harmful substances in the industrial exhaust gas and the gas treatment rate requirements. Specifically, in this embodiment, there are 3 sets of spray modules 300. According to the design of this scheme, a combination structure of multi-stage spray modules 300 and guide plate assembly 330 is adopted. The guide plate assembly 330 divides the airflow into multiple interconnected chambers, significantly extending the contact time and contact area between the exhaust gas and the spray solution. The highly dispersed droplets generated by the atomizing nozzle 321 further improve the neutralization reaction efficiency. The design of this structure effectively overcomes the problem of insufficient purification caused by excessively rapid exhaust gas dispersion in traditional treatment, thereby significantly improving the removal rate of acidic gases and harmful by-products and reducing the risk of secondary pollution.

[0023] In some embodiments of this utility model, the guide plate assembly 330 includes a first guide plate 331 and a second guide plate 332. The upper end of the first guide plate 331 is fixedly connected to the upper end of the outer shell 310, and the lower end of the second guide plate 332 is fixedly connected to the lower end of the outer shell 310. Specifically, in this embodiment, industrial waste gas bypasses the lower end of the first guide plate 331 and then enters the next spray module 300 or the exhaust chamber 200 through the upper end of the second guide plate 332. The structure of the first guide plate 331 and the second guide plate 332 extends the residence path of the waste gas in the spray module 300. The waste gas sequentially bypasses the lower end of the first guide plate 331 and the upper end of the second guide plate 332, forming an S-shaped flow. This flow pattern increases the contact time between the waste gas and the atomized spray solution and generates turbulence in the cavity, thereby improving the mixing efficiency of the gas and liquid phases and ensuring that harmful substances are more fully neutralized and removed.

[0024] In some embodiments of this utility model, the first guide plate 331 and the second guide plate 332 are respectively provided with guide grooves 3311 in the vertical direction. Specifically, in this embodiment, after the industrial waste gas rises in the spray tower, it first encounters the first guide plate 331. The upper end of the first guide plate 331 is fixedly connected to the upper end of the outer shell 310, and the airflow is forced to bypass the lower end of the first guide plate 331. Subsequently, the waste gas passes through the upper end of the second guide plate 332, and the lower end of the second guide plate 332 is fixedly connected to the lower end of the outer shell 310. During this process, the mixed liquid formed by atomization and neutralization treatment can flow downward along the guide grooves 3311 provided in the vertical direction of the first guide plate 331 and the second guide plate 332, and finally flow back to the bottom water tank 400. Through the design of this structure, the guide grooves 3311 provided on the surfaces of the first guide plate 331 and the second guide plate 332 provide a clear return channel for the mixed liquid. This structure enables more thorough gas-liquid phase separation, preventing liquid accumulation within the cavity and ensuring the recycling of the spray solution. The combination of the guide channel 3311 and the S-shaped airflow path enhances gas-liquid contact efficiency while maintaining the long-term stability and processing efficiency of the system.

[0025] In some embodiments of this utility model, the spray pipe assembly 320 includes a main pipe 323, with several branch pipes 324 arranged horizontally along the main pipe 323, and a control valve 325 installed on the main pipe 323; one end of the main pipe 323 is connected to the output end of the high-pressure pump 322. Specifically, in this embodiment, after the industrial waste gas rises in the spray tower, it first encounters the first guide plate 331. The upper end of the first guide plate 331 is fixedly connected to the upper end of the outer shell 310, and the airflow is forced to bypass the lower end of the first guide plate 331. Subsequently, the waste gas passes through the upper end of the second guide plate 332, and the lower end of the second guide plate 332 is fixedly connected to the lower end of the outer shell 310. During this process, the main pipe 323 of the spray pipe assembly 320 supplies spray liquid through the high-pressure pump 322, and the several branch pipes 324 arranged horizontally along the main pipe 323 distribute the liquid to each atomizing nozzle 321 to form atomized spray. After neutralization, the mixed liquid flows downwards along the guide groove 3311 on the surface of the guide plate back to the water tank 400. The spray pipe assembly 320 adopts a structure combining the main pipe 323 and the horizontal branch pipe 324, and with the help of the control valve 325, precise flow control can be achieved in different areas. This distribution method ensures uniform coverage of the atomizing nozzles 321. Combined with the S-shaped airflow path formed by the guide plate assembly 330 and the return design of the guide groove 3311, it enhances the gas-liquid contact efficiency while realizing the orderly collection and recycling of the sprayed liquid, effectively improving the stability and processing efficiency of the system operation.

[0026] In some embodiments of this utility model, a wire mesh demister 220 is provided inside the exhaust chamber 200. Specifically, in this embodiment, the wire mesh demister 220 provided inside the exhaust chamber 200 can effectively capture and remove trace droplets entrained in the purified gas, preventing mist from being emitted with the exhaust gas, thereby further improving the purification efficiency and operational stability of the system.

[0027] In some embodiments of this utility model, a viewing window 311 is provided on one side of the outer casing 310, and an inspection port 312 is provided on the top of the outer casing 310. Specifically, in this embodiment, the viewing window 311 facilitates real-time monitoring of equipment operation, and the inspection port 312 provides convenience for daily maintenance. The design of this structure jointly improves the stability and reliability of waste gas treatment, while reducing the difficulty of system maintenance and ensuring continuous and efficient purification of industrial waste gas.

[0028] In some embodiments of this utility model, the water tank 400 includes a water collection tank 410 and a water supply tank 420. A liquid collection hopper 313 is provided at the lower end of the outer shell 310, and the liquid collection hopper 313 is connected to the water collection tank 410. The input end of the high-pressure pump 322 is located in the water supply tank 420. Specifically, in this embodiment, industrial waste gas enters the air intake chamber 100 through the air intake pipe 110 and flows upward, passing sequentially through the S-shaped channel formed by the first guide plate 331 and the second guide plate 332. During this process, the spray pipe assembly 320 transports the alkaline solution in the water supply tank 420 to the atomizing nozzle 321 for atomization spraying through the high-pressure pump 322. After the waste gas comes into full contact with the atomized droplets, the mixed liquid produced by the neutralization reaction is collected in the water collection tank 410 through the liquid collection hopper 313. The gas continues to rise into the exhaust chamber 200, and after the droplets are removed by the wire mesh demister, it is discharged through the exhaust pipe 210. The design of separating the liquid collection hopper 313 from the water collection tank 410 and the water supply tank 420 enables the effective collection and recycling of spray liquid.

[0029] In some embodiments of this utility model, a filter plate 430 is provided between the water collection tank 410 and the water supply tank 420. Specifically, in this embodiment, by designing the filter plate 430, the filter plate 430 provided between the water collection tank 410 and the water supply tank 420 can effectively remove solid impurities in the circulating liquid and avoid clogging of the spray system.

[0030] In some embodiments of this utility model, an inlet pipe 421 and a drain pipe 422 are provided on one side of the water supply tank 420. An inlet valve 423 is provided on the inlet pipe 421, and a drain valve 424 is provided on the drain pipe 422. Specifically, in this embodiment, the inlet pipe 421 and the drain pipe 422 provided on one side of the water supply tank 420 are respectively used to replenish and replace the spray solution through the inlet valve 423 and the drain valve 424.

[0031] In some embodiments of this utility model, an air intake hopper 120 is provided on the air intake chamber 100, and an air intake pipe 110 is provided on the air intake hopper 120; an exhaust hopper 230 is provided on the exhaust chamber 200, and an exhaust pipe 210 is provided on the exhaust hopper 230. Specifically, in this embodiment, industrial waste gas enters the air intake chamber 100 through the air intake pipe 110 provided on the air intake hopper 120, and then flows upward, passing sequentially through the S-shaped channel formed by the first guide plate 331 and the second guide plate 332. During this process, the high-pressure pump 322 delivers the alkaline solution in the water supply tank 420 to the spray pipe assembly 320, where it forms uniform droplets through the atomizing nozzle 321 and fully contacts the waste gas. The reacted mixture is collected in the liquid collection hopper 313 through the guide channel 3311, flows into the water collection tank 410, and then enters the water supply tank 420 through the filter plate 430 to complete the circulation. The purified gas enters the exhaust chamber 200, where it passes through the wire mesh demister 220 to remove droplets, and is then discharged from the system through the exhaust pipe 210 located on the exhaust hopper 230. The water supply tank 420, equipped with an inlet pipe 421 and a drain pipe 422, allows for solution replenishment and replacement via corresponding valves. The structural design of the air inlet hopper 120 and the exhaust hopper 230 optimizes airflow distribution and reduces local turbulence. The filter plate 430 between the water collection tank 410 and the water supply tank 420 effectively intercepts solid particles, preventing clogging of the spray system. The S-shaped channel formed by the guide plate assembly 330 prolongs the gas-liquid contact time, and the wire mesh demister 220 ensures the cleanliness of the emitted gas. The independent valve control system of the inlet pipe 421 and the drain pipe 422 enables precise control and periodic replacement of the solution.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A spray tower for treating tail gas from a tetrafluoromethyl ether production line, characterized in that, include: An air intake chamber (100) is provided with an air intake pipe (110); An exhaust chamber (200) is provided with an exhaust pipe (210); A spray module (300) is provided, at least one of which is provided, and all of the spray modules (300) are arranged between the air intake chamber (100) and the exhaust chamber (200); the spray module (300) is provided with an outer shell (310), a spray pipe assembly (320) is provided inside the outer shell (310), an atomizing nozzle (321) is provided on the spray pipe assembly (320), and a high-pressure pump (322) is provided on the spray pipe assembly (320); a guide plate assembly (330) is provided inside the outer shell (310), and the guide plate assembly (330) can divide the outer shell (310) into multiple interconnected cavities; A water tank (400) is disposed below the spray module (300) and is used to provide spray solution to the spray pipe assembly (320).

2. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 1, characterized in that, The guide plate assembly (330) includes a first guide plate (331) and a second guide plate (332). The upper end of the first guide plate (331) is fixedly connected to the upper end of the outer shell (310), and the lower end of the second guide plate (332) is fixedly connected to the lower end of the outer shell (310).

3. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 2, characterized in that, The first guide plate (331) and the second guide plate (332) are respectively provided with guide grooves (3311) in the vertical direction.

4. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 3, characterized in that, The spray pipe assembly (320) includes a main pipe (323), which has several branch pipes (324) arranged in a horizontal direction. A control valve (325) is provided on the main pipe (323). One end of the main pipe (323) is connected to the output end of the high-pressure pump (322).

5. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 1, characterized in that, The exhaust chamber (200) is equipped with a wire mesh demister (220).

6. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 1, characterized in that, A viewing window (311) is provided on one side of the outer casing (310), and an inspection port (312) is provided on the top of the outer casing (310).

7. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 1, characterized in that, The water tank (400) includes a water collection tank (410) and a water supply tank (420). A liquid collection hopper (313) is provided at the lower end of the outer shell (310), and the liquid collection hopper (313) is connected to the water collection tank (410). The input end of the high-pressure pump (322) is located in the water supply tank (420).

8. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 7, characterized in that, A filter plate (430) is provided between the water collection tank (410) and the water supply tank (420).

9. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 8, characterized in that, The water supply tank (420) is provided with an inlet pipe (421) and a drain pipe (422) on one side. The inlet pipe (421) is provided with an inlet valve (423), and the drain pipe (422) is provided with a drain valve (424).

10. The spray tower for treating tail gas from a tetrafluoromethyl ether production line according to claim 1, characterized in that, An air intake hopper (120) is provided on the air intake chamber (100), and an air intake pipe (110) is provided on the air intake hopper (120); an exhaust hopper (230) is provided on the exhaust chamber (200), and an exhaust pipe (210) is provided on the exhaust hopper (230).

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